"Sir, the patch is done, but it tanks performance..."
"Don't you dare say it, the patch works everything is fine nothing uas changed hut the product is now more secure, it's a win for everyone. Is that clear?"
I have a theory as to what happened here. (I am retired from Intel.) The wording about benchmarking was typical for beta products (hardware and software). I think someone just misunderstood what the purpose was of the microcode update and picked the wrong text file. (Not that they'd admit this, of course.)